Important Instructions: LFCS

Exam Details

  • The exams are delivered online and consist of performance-based tasks (problems) to be solved on the command line running Linux.
  • The exams consist of 20-25 performance-based tasks.
  • The exams are expected to take 2 hours to complete
  • The exams are proctored remotely via streaming audio, video, and screen sharing feeds.

What You Need For Your Exam

Candidates should run the PSI Online System Security Check to verify that their machine meets the technical requirements for taking a proctored exam.
The online proctored exam is taken on PSI proctoring platform "Bridge", using the PSI Secure Browser (a web browser created to guarantee a secure exam delivery over a virtual connection).
The secure browser download/installation will begin when you Select “Launch exam” from the PSI Dashboard.
Candidates must provide their own computer with:
  • Supported OS: Please review the System Requirements, published by PSI, in particular the supported Operating System Information.
  • All browsers are supported, however PSI highly recommends using Chrome as the registration browser because the secure browser is Chrome-based and will give a more accurate experience.
  • Reliable internet access
    • Ensure others on the same internet connection are not performing activities that use excessive bandwidth (i.e. holding conference calls, streaming content, gaming, etc.)
    • A wired connection is often more stable and robust than a wireless connection
    • Turn off bandwidth-intensive services (e.g. file sync, dropbox, BitTorrent)
  • Microphone
    • Mac users may need to allow the PSI Secure Browser within their 'System Preferences: Security & Privacy: Privacy' settings for Microphone, Camera, Automation and Input Monitoring.
    • Please check to make sure it is working before you start your exam session.
  • Webcam
    • Ensure the webcam is capable of being moved as you will have to pan your surroundings to check for potential violations of exam policy.
    • Mac users may need to allow the PSI Secure Browser within their 'System Preferences: Security & Privacy: Privacy' settings for Microphone, Camera, Automation and Input Monitoring.
    • If you will be testing from an employer-provide ISP or will use an employer provided machine, please ensure that streaming will be allowed using WebRTC.
Candidates are not allowed to have other applications or browser windows running except the one on which the Exam is being shown.
Please review the PSI Bridge Platform: System Requirements to ensure your machine will meet the requirements of our online proctor.

Acceptable Testing Location

Below are the expectations for an acceptable testing location:
  • Clutter-free work area​
    • No objects such as paper, writing implements, electronic devices, or other objects on top of surface.
    • No objects such as paper, trash bins, or other objects below the testing surface.
  • Clear walls
    • No paper/print outs hanging on walls.
    • Paintings and other wall décor is acceptable.
    • Candidates will be asked to remove non-décor items prior to the exam being released.
  • Lighting
    • Space must be well lit so that proctor is able to see candidate’s face, hands, and surrounding work area.
    • No bright lights or windows behind the examinee.
  • Other
    • Candidate must remain within the camera frame during the examination.
    • Space must be private where there is no excessive noise. Public spaces such as coffee shops, stores, open office environments, etc. are not allowed.
Please see the Linux Foundation Certification Exams: Candidate Handboo​k for additional information covering policies, procedures and rules​ during the exam.

ID Requirements to take the Exam

  • Candidates are required to provide a non-expired Primary ID that contains Candidate’s photograph, signature and full name (see acceptable forms of ID in the table below)
  • The name on your Primary ID must exactly match the verified name on your exam checklist.
  • If the Candidate’s full name on their Primary ID contains non-latin characters, then the Candidate must ALSO provide a non-expired Secondary ID containing their full name in Latin Characters and signature, OR a notarized English translation of their Primary ID along with the non-latin character Primary ID
Primary ID
(non-expired and including photograph and signature)
Secondary ID
(non-expired and including signature with
Candidate name in Latin characters)
Government-issued driver’s license/permit Government-Issued local language ID (plastic card with photo and signature)
National Identity card
State or province-issued identity card​
住民基本台帳 (Basic resident register with Photo) or マイナンバーカード(My number card)
Debit (ATM) Card
Credit Card
Health Insurance Card
U.S. Social Security Card
Employee ID Card
Student ID Card
Japanese Health Insurance Card
Additional Allowances:
  • Some government issued ID such as a passport, driver’s license, military ID or state/country card may be a biometric type and may or may not contain a signature. In these cases Primary ID will be accepted without a signature on condition that you also present a Secondary ID which does contain your signature (e.g. bank, credit or debit card)
  • For candidates testing in Japan, a Driver’s License (with name and recent recognizable photo) is acceptable as a primary ID as long as it is accompanied with a Japanese health insurance card (健康保険証). In Japan, the Japanese health insurance card (健康保険証) is an acceptable form of secondary ID.
  • Minors, between the age of 16-18, are permitted to take an online proctored exam with PSI, provided they complete the following requirements:
    • A Parent/Guardian must complete the Parental Release for Testing of Minors form, and submit it to, at least 2 weeks prior to the scheduled date of the exam
    • At check in, the minor candidate must present a valid student ID as a form of identification
    • During the PSI check-in process, the candidate's guardian must also present a valid ID and must provide verbal consent during the PSI check-in process.

Sanctioned Countries

Exams may be administered to citizens of a sanctioned country listed below PROVIDED the citizens are tested OUTSIDE the sanctioned country and their exam registration and current ID show an address OUTSIDE the sanctioned country.
  • Cuba
  • Iran
  • Syria
  • Sudan
  • North Korea
  • Crimea Region of Ukraine

Resources allowed during exam

The following tools and resources are allowed during the Exam as long as they are used by Candidate to work independently on exam tasks (i.e. not used for 3rd party assistance or research) and are accessed from within the Linux server terminal on which the Exam is delivered (resources that cannot be accessed from within the terminal are not allowed):
  • Man pages
  • Documents installed by the distribution (i.e. /usr/share and its subdirectories)
  • Packages that are part of the distribution (may also be installed by Candidate if not available by default)
Please see the Candidate Handboo​k for additional information covering policies, procedures and rules​ during the exam.

Exam Environment

  • The exam environment consists of a base node (hostname:node-1​ ​) and a number of LXD​ containers and remote nodes on which certain questions must be answered. Those LXD​ containers and remote nodes are accessible via ssh​ ​, using a command such as the following: ssh <nodename>
  • You will be directed to ssh​ ​ into appropriate containers and remote nodes, where needed, at the start of each question.
  • If no ssh​ ​ instruction is provided, you must answer the question on the base node (hostname:node-1​).
  • When you have finished working on a node other than node-1​ ​, you must ensure that you return to node-1​ when you have completed the item.
  • Nested ssh​ ​ is not supported.
  • ~/.ssh/config​ is configured appropriately for both the root​ ​ and student​ ​ users to ssh​ ​ to all nodes as root​, and you can also find entries in /etc/hosts​ ​ for all containers/remote nodes that may be required during your exam for your reference.
  • You should avoid rebooting node-1​ ​, as the supporting infrastructure will take around 15 minutes to start, and stabilize.
  • You are free to reboot any node other than node-1​ ​ at any time.
  • You may obtain root​ ​ privileges at any time using the following command: sudo -i
  • You should not manipulate the firewall on the base node (hostname: node-1​ ​).

Technical Instructions

  1. 1.
    Root privileges can be obtained by running 'sudo −i'.
  2. 2.
    Do not stop or tamper with the certerminal process as this will END YOUR EXAM SESSION.
  3. 3.
    Do not block incoming ports 8080/tcp, 4505/tcp and 4506/tcp. This includes firewall rules that are found within the distribution's default firewall configuration files as well as interactive firewall commands.
  4. 4.
    Use Ctrl+Alt+W instead of Ctrl+W. Ctrl+W is a keyboard shortcut that will close the current tab in Google Chrome.
  5. 5.
    Ctrl+C & and Ctrl+V are not supported in your exam terminal.
    To copy and paste text, please use;
    For Linux: select text for copy and middle button for paste (or both left and right simultaneously if you have no middle button). For Mac: ⌘+C to copy and ⌘+V to paste. For Windows: Ctrl+Insert to copy and Shift+Insert to paste.
  6. 6.
    Installation of services and applications included in this exam may require modification of system security policies to successfully complete.
  7. 7.
    Only a single terminal console is available during the exam. Terminal multiplexers such as GNU Screen and tmux can be used to create virtual consoles.


Answers to Frequently Asked Questions (FAQ) can be found ​here.
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